Apparatus for producing pulverulent hydraulic binders with bituminous constituents



Sept. 22, 1936. SOMMER 2,055,224

APPARATUS FoR PRODUCING PULVERULENT HYDRAULIC BINDERS WITH BITUMINOUS CONSTITUENTS Original Filed Nov. 1933 R E M% 99% mm G w A 4 VI BM Patented Sept. 22, 1936 APPARATUS FOR PRODUCING. PULVERU- LENT HYDRAULIC BINDERS WITH BI- TUMINOUS CONSTITUENTS Albert Sommer, New York, N. Y., assignor to '1. R. O. Corporation, Wilmington, DeL, a c poration of Delaware Application November 1,1933, Serial No. 696,149. Renewed August -1, 1936. In Germany March 28, 1933 11 Claims.

The invention relates to an apparatus for producing a pulverulent hydraulic binder having bituminous constituents.

For the formation of a cloud from a pulverulent hydraulic base material in a collecting chamber it has been found disadvantageous to employ large air quantities because the latter hinder a thorough mixing of the bitumen with the particles of the hydraulic base.

To obviate this drawback, according to this invention, the hydraulic base material is fed through a pipe whose discharge end is located close to the discharge end of a pipe through which compressed air of considerable pressure (about 4 atmos.) passes. In this manner it is possible to produce in the collecting chamber an efiective cloud by a comparatively small quantity of air of high tension. It is possible to provide two compressed air pipes that terminate in a single mouthpiece in which also terminates the pipe feeding the liquid bituminous material, and to arrange said pipes in superposed position.

To make my invention more clear the same is illustrated in the accompanying drawing in which similar reference characters denote corresponding parts and in which:

Fig. l is a front elevation partly in section;

Fig. 2 is a plan view;

Fig. 3 is a vertical section on line III-I11 of Fig. 1; and

Fig. 4 is a vertical section on line IV--IV of Fig. 1.

Referring to the drawing more in' detail, i denotes a funnel shaped storage receptacle for the pulverulent material, such as cement, lime or the like, whose bottom is formed by a sieve 2 adapted to retain the coarse particles of the material and Which leads into a distributing device 3. Arranged over the sieve are stirrers or beaters (not shown) to prevent clogging of the material dropping from the storagereceptacle. The distributing device 3 comprises a housing 3' in which is provided a drum 5 mounted on a shaft 6 having paddles or blades 3. The shaft 6 which is journaled on both sides of the housing 3' carries a gear l which meshes with gear 8 mounted on a shaft 9. The latter has fixed to it a conical pulley Hi connected by belt H to another conical pulley i2 mounted on shaft 83. The latter carries a pulley M driven from a suitable motor (not shown). The transmission ratio of said conical pulleys it, i2 is so calculated that the quantity of pulverulent material passing out from the storage receptacle i can be varied between 10 kg. per minute to 50 kg. per minute.

The material dropping from the distributor 3-5 passes through a vertical chute l5 into a horizontal channel IS in which is arranged a worm feed I! mounted on a shaft [8 joumaled in bearings l6, l6" and on which is mounted the 5 sprocket wheel IS. The latter is connected by sprocket chain 20 to sprocketwheel 2| mounted on shaft 6. Near its discharge end said horizontal channel I6 is provided with a tubular downwardly extending projection 23 formed at its bottom with 10 a mouthpiece 23. The material is fed through said channel by the worm I! from left to right (Fig. 1) and is delivered over an incline 24 into the mouthpiece 23 in front of the nozzle 25 of a compressed air pipe 25. The latter leads through 15 an air reservoir to a compressor (not shown) adapted to produce pressure of about 4 atmos. A branch pipe 26 leads from pipe 25 into one end of a heating coil 2'! of a heating device 21, the opposite end of which coil 21' is connected to a pipe 20 28 whose discharge end or nozzle 28 terminates in the same mouthpiece 23 just below the nozzle 25 of pipe 25. Leading into the same mouthpiece 23' aiid terminating close to and below the nozzle 28' is the nozzle 29 of tube 29 submerged 25 in liquid bituminous material or the like contained in the vessel M which is equipped with an electric heater 42. Leading into said vessel ii through a rotary pump 4 1 or the like is a pipe 43 connected to the vessel $5 for the bituminous material. This vessel is provided with a heating de vice at having a chimney 46' and whereby the bituminous material is'adapted to be heated to a temperature ranging between to C. To. prevent overflow the storage vessel ii is provided 35 with an overflow pipe 41 which leads into the vessel t5.

While the compressed air passing out through the nozzle 25' blows the pulverulent hydraulic material, sliding down the incline 25, through an 40 opening 22 into a mixing chamber 22, the heated compressed air passing out through the nozzle 28 will suck up the liquid bituminous material through the nozzle 29' of the tube 29 and blow it in form of a fine mist or a cloud into the chamber 22. The two clouds, namely that of the pulverulent material and that of the bituminous material, 7 become so intimately mixed that the individual particles of the hydraulic material become covered with a fine film of bituminous material. 50 This product settles on the bottom of chamber 22 and from there is fed by a worm feed 30 to a collecting chamber (not shown) where it may be packed in bags.

The compressed air may be suitably filtered, by 55 filtering bags, as described in my copending application, to recuperate the material carried along with said air.

Owing to the high air tension employed a smaller number of filtering bags is required than when using greater quantities of air of low tension.

In lieu of the single nozzles 25' and 28' two or more of each may be arranged adjacent to one another in the common mouthpiece, provided care is taken that the air currents will pass over the entire incline 24 and that the conical clouds of bituminous material produced by the nozzles 28 before mixing with the clouds of hydraulic material will not intersect the latter.

What I claim is:

1. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, the combination with a closed mixing chamber having an inlet means for feeding pulverulent base material toward said chamber, a compressed air conveyor having a nozzle, means for delivering said material from said feeding means in front of said nozzle, whereby said material is blown through said inlet into said chamber in form of a cloud, a container of liquid bituminous material and a compressed air means for atomizing and dispersing said liquid bituminous material through said inlet into said chamber in form of a cloud, both said compressed air conveyor and compressed air means being arranged in superposed position, the dispersion of said two materials being efiected simultaneously so that both clouds are caused to intimately mix with one another.

2. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, the combination with a mixing chamber having an inlet opening, of a feed for feeding pulverulent base material through said opening intd said chamber, a compressed air feed pipe, means for delivering said pulverulent material in front of the discharge end of said compressed air pipe, a second compressed air feed pipe having a discharge opening adjacent and below said first named compressedair discharge opening and afeed pipe for feeding liquid bituminous material through said opening into said chamber, said last named feed' pipe terminating in front of and close to the discharge opening of said second compressed air pipe, whereby said materials are delivered into said chamber in form of intermixing clouds.

3. In an apparatus as per claim 2 in which the said compressed air feed pipes terminate in a common mouthpiece directed toward the opening of said mixing chamber.

4. In an apparatus as per claim 2 in which are provided a channel through which is fed the pulverulent hydraulic material and which is formed with a mouthpiece at its discharge end and a chute for delivering said material in front of the compressed air nozzle terminating in said mouthpiece.

5. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, a closed mixing chamber having an inlet opening, feeding means for the hydraulic material having a mouthpiece directed toward said opening, compressed air feed pipes terminating in said mouthpiece in superposed position, heating means for heating said compressed air, a feed for liquid bituminous material terminating close to one of said compressed air pipes and means for delivering the pulverulent binderin front of the other compressed air pipe.

6. In an apparatus as per claim 5 in which means are provided for controlling the delivery of said pulverulent hydraulic material into sai feeding means.

'7. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, a mixing chamber having an inlet, means for delivering pulverulent base material adjacent said inlet, a container for liquid bituminous material, means terminating near said delivery means for dispersing the pulverulent material through said inlet into said chamber in form of a cloud or mist and means for atomizing and dispersing the liquid bituminous material from said container through said inlet into said chamber in form of a cloud or mist, both said last named means being arranged in superposed position the dispersion of the base material and of said atomized bituminous material being effected simultaneously, so that the two clouds are caused to intimately mix with one another.

8. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, a mixing chamber having an inlet, means for delivering pulverulent base material adjacent said inlet, a container for liquid bituminous material, a pair of conveyors for heated compressed air, each having dispersing means directed toward said inlet and one terminating near said delivery means, means for delivering liquid bituminous material from said container and cooperating with the second compressed air conveyor to atomize and disperse said liquid bituminous material into saidchamber, both said last named means being arranged in superposed position both materials being dispersed simultaneously in form of clouds or mists so that the latter become intimately mixed.

9. In an apparatus for producing a pulverulent hydraulic binder having bituminous constituents, a mixing chamber having an inlet, means for delivering pulverulent base material near said chamber, a vessel containing bituminous material, means for liquefying and heating said bituminous material to -180 C., a pair of compressed air conveyors having nozzles terminating near and directed toward said inlet, means for heating said compressed air, one of said nozzles serving for the dispersion of the pulverulent material from said delivering means into said chamber in form of a cloud or mist, suction means submerged in the liquid bituminous material and terminating near the other nozzle and adapted in cooperation therewith to atomize and disperse the liquid bituminous material into said chamber in form of a cloud or mist, both said last named means being arranged in superposed position the dispersion of said two materials being effected simultaneously so that both clouds are caused to intimately mix.

10. An apparatus for producing a pulverulent hydraulic binder having bituminous constituents, a mixing chamber, means for delivering pulverulent base material near the inlet of said chamber, means for delivering heated liquid bituminous material near the inlet of said chamber and a plurality of vertically superposed conveyors for heated compressed air directed toward said inlet and formed with nozzles, some of said nozzles being adapted to disperse said pulverulent material into said chamber in form of a cloud or mist and some to atomize and disperse said heated bituminous material into said chamber in form of a cloud, so that both clouds will be caused to intimately mix with one another.

11. A method of producing a pulverulent hydraulic binder having bituminous constituents consisting in delivering pulverulent base material near an inlet of a mixing chamber, heating a liquid bituminous material, delivering the same near said inlet, heatingoompressed air and conveying it in separatevertically superposed currents toward said inlet so as to simultaneously disperse said pulverulent material into said chamber in form of a cloud or mist and atomize and disperse the liquid bituminous material into said chamber in form of a cloud or mist and to cause both 6 clouds to intimately mix.

ALBERT SOMMER, 

